Beam and girder support



(No Model.) P. GAVALLARO. BEAM AND GIRDB'R SUPPORT.

No. 495,783. Patented Apr. 18', 1893; I

III,

UNITED STATES PATENT OFFICE.

FRANCESCO CAVALLARO, OF SAN JOSE, CALIFORNIA.

BEAM AND GIRDER SUPPORT.

SPECIFICATION 'forming part Of Letters Patent No. 495,783, dated April18, 1893. Application filed February 10, 1898. Serial No. 461,794.. (Nomodel.)

To all whom it may concern.-

Be it known that], FRANCESCO CAVALLARO, a citizen of the United States,residing at San J os, Santa Clara county,State of California,

have invented an Improvement in Beam and Girder Supports; and I herebydeclare the fo1- lowing to be a full, clear, and exact description ofthe same.

My invention relates to a device for supporting the ends of beams orgirders which abut against other beams or girders at any angles thereto.

It consists in certain details of construction which will be more fullyexplained by referenceto theaccompanyingdrawings,inwhich- Figure 1 is aperspective view of my invention. Fig. 2 is a vertical section of thegirder A, and the supporting box 0. Fig. 3' is a vertical section of thegirder B and elevation of the box 0.

The object of my invention is to provide an easily adjustable supportfor the abutting ends of beams or girders where they are attached toother correspondingly shaped beams or girders and at any angle thereto,without cutting away or weakening the abutting beams.

The device may also be used to support the ends of abutting woodenbeams, in place of the stirrup ordinarily used.

A represents an iron I beam or girder, and Bis a similarly shaped beamor girder which abuts against the first one. It has hitherto beencustomary, where such beams are united, to support the abutting beamupon the flange of the first one, and in order to do this and retain theupper surface of the abutting beam upon a level with the other, it isnecessary to cutaway the two flanges of the abutting beam, so that thelower edge of the web can rest upon the flange of the beam against whichit abuts, and this greatly weakens the abutting beam and makes itssupporting edge so narrow as to often endanger the strength of thesupporting flange of the other beam. In order to overcome thisdifl'iculty, and provide a support for the abutting beam,in which thefull strength of both beams is retained, I form a box or casing C whichis fixed to and supported by the first beam A, and in turn supports theabutting beam. The upper part of this casing is left open. The anglemade at the j unction of the back and bottom plate is such that theinner surfaceof the bottom plate is just flush with the bottom of thegirder or beam to which it is to be attached, and this inner surface isthe support for thelower surface of the abutting beam B. When this beamis thus supported, it will be seen that the top of the beam will be justflush and level with the top of the beam which supports it, and noportion of the abutting beam needs to be cut away. If the abutting beamis light or if made of wood, the support may be made of any metal, andonly the vertical back and the horizontal base will be necessary, butfor heavy work I make the support with vertical sides which areseparated sufiiciently to receive the full Width of the top and bottomflanges of the abutting beam, and the beam is easily let into its placefrom above without any twisting or turning, such as would be necessaryif the rib of the beam extended inwardly far enough to rest upon theflange of the beam which supports it. The inner side or back of the caseis cast or formed with projecting enlargements, through which bolt holesare made, and corresponding holes are made in the beamA through whichbolts pass. The holes which are made through the back of the support Care made rectangular, and of a size sufficient to receive the bolt headswhich thus lie flush with the inner surface of the back and present noobstruction to the introduction of the supported beam. At the same time,the projections upon the outer surface of the back are of sufficientdiameter and size to give the requisite strength to the back which wouldotherwise be weakened by reason of the counter-sinking of the boltheads. This construction holds the bolts steadily, and prevents theirbeing turned when the nuts are put upon the opposite ends of, the boltsand screwed up against the rib of the supporting beam. The back throughwhich the bolts pass is made sufficiently shorter than the sides, sothat it will just enter between the top and bottom flanges of thesupporting beam, and when the bolts which secure it to the beam aredrawn tight, it is firmly fixed and practically becomes a part of thebeam. It thus forms a supporting box, into which the end of thetransverse beam to be supported is set with its top and bottom flangesjust flush with those of the other beam. One or more bolt holes are madethrough the sides of the support, and corresponding holes in the rib ofthe transverse beam,and bolts passin g through these holes, lock thewhole firmly together and prevent its being moved or withdrawn endwise,in case of separation or springing of the walls. It the abutting beam isof less depth than the supporting one, the bot tom plate of the supportmay be raised until the tops of the beams are level.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A beam and girder support consisting of a casing having a horizontalbottom on a level with the bottom of the supporting beam and open top, aback made shorter than and adapted to enter between the top and bottomflanges of the supporting beam, projections formed upon the outer faceof the back, holes made centrally through said projections, andcorresponding holes through the rib of the supporting beam, boltsfittingsaid holes, and countersunk openings in the inner face of theback into which the bolt heads are received and prevented from turningwhen the nuts are screwed upon the opposite ends to unite the casing tothe beam, substantially as herein described.

2. A beam and girder support, consisting of an open topped box having abottom,the upper surface of which is flush with the bottom of thesupporting beam and adapted to receive and support the end of theabutting beam, parallel sides between which the top and bottom flangesof the abutting beam are received, aback made sufficiently shorter thanthe sides to enter and fit between the top and bottom flanges of thesupporting beam, holes and countersunk openings through said back forthe reception of the bolt heads, thickened extensions upon the-outerface of the back,with holes through which the bolts pass, correspondingholes through the rib of the supporting beam, and nuts screwed upon theends of the bolts which project through the rib, whereby the support isbound and secured to the supporting beam, and the beam to be supportedrests therein with its top and bottom flanges flush with those. of thesupporting beam, substantially as herein described.

In witness whereof I have hereunto set my hand.

FRANCESCO GAVALLARO. Witnesses:

A. S. MACKENZIE, WILLIAM BURTON WARD.

